Merupakan Unit Pendukung Akademis (UPA) yang bersama-sama dengan unit lain melaksanakan Tri Dharma Perguruan Tinggi (PT) melalui menghimpun, memilih, mengolah, merawat serta
melayankan sumber informasi kepada civitas akademika Universitas Jember khususnya dan masyarakat akademis pada umumnya.
Reduced graphene oxide (RGO) has many advan-tages over graphene such as low-cost, aqueous processable and industrial-scalable. However, two main limitations that prevent the use of RGO in electronics are the highelectrical resistance and largeelectrical resistance devi-ation between fabricated devices. This limits RGO’susein biosensors, capacitors and other electronic devices.Herein, we present (1) a modified Hummer’s method to obtain large RGO flakes via in-situ size fractionationand (2) the novel growth of RGO which can bridge the gaps in-between existing RGO flakes. Together, the setwo processes reduced the electrical resistance drastical-ly from 1.99E + 06 to 4.68E + 03Ω/square and the standard deviation decreased from 80.5 % to 16.5 %.The RGO was then fabricated into a field-effect transistor biosensor. A 1 pmol to 100 nmol change in Cytochrome Cprotein corresponded to a 3 % change in electrical resistance.The reported improved RGO synthesis method and subsequent growth enable large-scale application of RGO inpractical electronic devices such as biosensors